GHSA-qh54-9vc5-m9fg — maddy
LOWGHSA-qh54-9vc5-m9fg is a low-severity (CVSS 3) vulnerability in github.com/foxcpp/maddy. A fix is available for github.com/foxcpp/maddy — see the affected versions and patch details below.
MD5 hash support in github.com/foxcpp/maddy
Real-World Exposure
github.com/foxcpp/maddyReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Impact
This vulnerability affects maddy 0.5.1, 0.5.0 users using auth.shadow module and an extremely outdated system that still allows MD5 hashes in /etc/shadows.
Patches
Patch is available as part of the 0.5.2 release.
Workarounds
Ensure MD5 hashes are not present in /etc/shadow.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/foxcpp/maddy | ≥ 0.5.0&&< 0.5.2 | 0.5.2go get github.com/foxcpp/maddy@v0.5.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/foxcpp/maddy, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/foxcpp/maddy to 0.5.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qh54-9vc5-m9fg is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-qh54-9vc5-m9fg can be triaged on real exposure rather than presence alone.
Tailored to GHSA-qh54-9vc5-m9fg. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-qh54-9vc5-m9fg in your dependencies?
O3 Security finds GHSA-qh54-9vc5-m9fg across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.